Raspberry PI 3, Ubuntu & LXC Howto

Have a micro SD card, of at least 16 GB, handy (Minimum is 8 GB but it may run quickly short of space).

Go to this pageof the Ubuntu Pi Flavour Maker website to download the Ubuntu Image you will prefer and install it onto a micro SD card following the instructions on that page.

Connect the Raspi to an HDMI Monitor, an USB Keyboard & Mouse and an Ethernet wired switch (with Internet access).
Once the micro SD is inserted back into the RasPI board and it is turned on the Ubuntu installation will start and behaves like any other Ubuntu installation.

Update/Upgrade the RasPI with apt:

sudo -i ;# or login as root
apt-get update
apt-get dist-upgrade​

It will take a relatively long time to complete the process but at the end the RasPI will be updated to the latest packages.

Open a console shell, or a remote ssh shell, or a terminal session under the Window Manager of the Ubuntu Distro you have chosen.

Once the installation is completed you can start the tweaking I’m suggesting:

sudo -i ;# or logged as root
wget http://downloads.sourceforge.net/project/webadmin/webmin/1.820/webmin_1.820_all.deb
wget http://downloads.sourceforge.net/project/webminstats/Sysstats/2.14/webmin-sysstats_2.14_all.deb
dpkg -i webmin_1.820_all.deb ;# Will complain of dependencies, We will fix it next
;# It will take quite a while ...
apt-get -f install ;# To fix dependencies​
dpkg -i webmin-sysstats_2.14_all.deb ;# Will complain of dependencies, We will fix it next
apt-get -f install ;# To fix dependencies​
apt-get install libcgi-pm-perl ;# not in the dependencies tree ...
reboot ;# Just to settle everything ...
# Once rebooted
# You can now open the browser on your desktop and connect to https://<your_raspi_ip_address>:10000